I think both PHW and GHW would look great - it really just depends on what look you're going for. My opinion is that a darker blue with GHW looks more classic, and they can simultaneously enhance the color out of the other (if that makes sense). With PHW, I definitely get a more casual look - but that's also my personal preference i.e. I only requested PHW for a B30 for dark blues/greens/purples and burgundy/rouge H (although with the exception of RGHW for blues haha). And for what I've seen in permabrass, I agree with others that it doesn't seem as complementary - almost fades or dampens out the color tones.
Since you don't have any PHW as of yet - this might be the opportunity to do so. Good luck!🍀
Since you don't have any PHW as of yet - this might be the opportunity to do so. Good luck!🍀